US4387677A - Fuel, more especially auxiliary starting fuel, injectors for internal combustion engines and to auxiliary carburetors associable with such injectors - Google Patents

Fuel, more especially auxiliary starting fuel, injectors for internal combustion engines and to auxiliary carburetors associable with such injectors Download PDF

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Publication number
US4387677A
US4387677A US06/276,460 US27646081A US4387677A US 4387677 A US4387677 A US 4387677A US 27646081 A US27646081 A US 27646081A US 4387677 A US4387677 A US 4387677A
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Prior art keywords
auxiliary
fuel
pipe
reservoir
carburetor
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US06/276,460
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English (en)
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Jean Guerrier
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HOLT LLOYD SA
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HOLT LLOYD SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/001—Arrangements thereof

Definitions

  • the present invention relates to improvements made to installations for assisting start-up in internal combustion engines and, more particularly, it relates to improvements made, in such installations, on the one hand, to the fuel injectors for internal combustion engine carburetors, more especially for auxiliary carburetors and, on the other hand, to auxiliary starting carburetors for internal combustion engines, arranged to deliver to the engine, through at least one injector such as those envisaged above, an auxiliary fuel from a reservoir containing said fuel in liquid form with a pressurized gas expellent chemically inert with respect to said liquid fuel (more especially an aerosol), the reservoir having an expulsion port with a back-pressure valve normally maintained in the closed position, said auxiliary carburetor being arranged so that said reservoir is situated at its lower part.
  • auxiliary carburetors are relatively space-consuming and, when they are equipped with their removable auxiliary fuel reservoir, they can only be housed with difficulty on board a motor vehicle such as a truck where free space is limited.
  • auxiliary carburetors controlled by means of an electromagnetic coil fed from a battery, are not capable of correct operation at very low temperatures (of the order for example of -30° C. to -35° C.) when the power available at the terminals of the battery is too low (only about a third of the power available at normal temperature) for suitably energizing the electro-magnetic coil.
  • the invention has then essentially as object to improve start-up assisting installations for internal combustion engines so that they answer better than those known up to present the different requirements of the technique.
  • the invention aims more especially at improving fuel injectors, more especially for auxiliary starting carburetors, so that it is now necessary to manufacture only a single type of injector usable whatever the power of the engine to which it is fitted, so as to obtain substantial economy not only in so far as manufacturing costs are concerned but also in so far as the cost for storing parts for maintenance is concerned.
  • the invention also aims at improving auxiliary starting carburetors of the above-mentioned kind, intended more especially for supplying improved injectors in accordance with the invention, so that they operate more satisfactorily than in the past, in particular at low temperatures and so that they are more compact than present carburetors, and therefore more easily housable in a motor vehicle such as a truck, for example in or under the dashboard.
  • a fuel injector for an internal combustion engine carburetor, more especially for an auxiliary carburetor, and is characterized in that the free end of the injector has at least one cut side and in that an injection port emerges in this cut side, the slope of the cut side with respect to the axis of the injector being such that in operation, the generatrix of the fuel spraying cone, the nearest to the wall of the manifold carrying the injector, is parallel to said wall.
  • the injector further comprises deflecting fins for creating swirling spraying of the auxiliary fuel and for improving mixing thereof with the air and ordinary fuel.
  • auxiliary starting carburetor which, in a second aspect of the invention, is characterized in that it comprises in combination and in the order given, from bottom to top of the auxiliary carburetor disposed in its operating position:
  • closure means adapted to selectively close off said outlet port, under the action of control means
  • a mobile pipe whose lower end emerges into the lower chamber and is arranged to form said means for controlling the closure means, said pipe being adapted to occupy at least two operational positions, namely a first position (rest position) in which its lower end does not cooperate with the back-pressure valve of the reservoir and a second position in which it acts on said back-pressure valve to open the port of the reservoir,
  • an electromagnetic coil for controlling the movement of the pipe from its first to its second operational position, said coil having a core integral with the pipe which passes therethrough,
  • first return means for returning the pipe from its second to its first operational position when the electromagnetic coil is not energized
  • a piston movable inside said enclosure for defining therein a variable volume upper chamber, into which emerges the upper end of the pipe,
  • auxiliary carburetor which may be housed in a free space of small dimensions under the engine bonnet, even in or under the dashboard of a motor vehicle such as a truck.
  • the auxiliary carburetor is situated directly within reach of the driver and it is no longer necessary to provide remote actuating means.
  • the replacement of the removable fuel reservoir is facilitated and may be effected more rapidly.
  • the electric power consumption caused by energization of the electromagnetic coil only takes place for filling the chamber, the delivery of the measured amount of fuel being effected solely under the action of the second return means. For this reason, electric power is drawn from the supply battery before the starter motor is actuated to drive the engine. The power drawn from the battery is then spread out in time, which enables an engine to be started even at very low temperatures, when only about a third of the rated power of the battery is available.
  • Such a mode of operation becomes imperative when the control for starting the engine is arranged so that all the auxiliary electric devices (e.g. headlamps of a vehicle) are switched off when the starter motor is energized.
  • auxiliary electric devices e.g. headlamps of a vehicle
  • the injection pressure of the fuel remains substantially the same at each operation and remains independent of the filling rate of the reservoir.
  • the injector(s) constructed in accordance with the first aspect of the invention are optimally supplied and so rapid start-up of the engine is ensured in particularly unfavorable temperature conditions, at the same time avoiding complete discharge of the battery during an extended start-up phase.
  • an adjustable stop is provided for limiting the travel of the piston. It is thus possible to provide a single apparatus usable for engines of different powers, the predetermined amount of auxiliary fuel injected at start-up being adjusted with respect to the power of the engine by appropriate adjustment of the stop.
  • all the seals associated with the moving parts driven by the electro-magnetic coil are lipped seals, which reduces to a minimum the friction opposing movement of the rod, and so the power drawn from the battery. Furthermore, such seals are particularly well suited to equipping apparatus operating under very low temperatures.
  • FIG. 1 shows, in section, an auxiliary carburetor constructed in accordance with the invention
  • FIGS. 2 and 3 show two embodiments of injectors in accordance with the invention.
  • FIG. 4 shows, on a larger scale, a detail of the injectors of FIGS. 2 and 3.
  • the auxiliary carburetor 1 of the invention comprises a casing 2 housing, in its central part, an electromagnetic coil 3 connected (in a way not shown) to terminals 4 for connection to an electric supply circuit connected to a DC electric source, generally a battery of accumulators (not shown).
  • the mobile core 5 of the coil has passing therethrough a hollow rod 6 which is integral with the core and which extends therebeyond on each side.
  • the lower part of rod 6 is engaged in a housing 7 provided in the casing, which housing has a lower orifice forming the intake port 8 of the carburetor and a lateral orifice forming the outlet port 9 of the carburetor.
  • the outlet port 9 is provided with closure means which comprise, on the one hand, an annular groove 10 formed in rod 6 towards the lower end thereof and, on the other hand, an annular lipped seal 11 surrounding the rod and disposed between the outlet port 9 and the inlet port 8.
  • closure means comprise, on the one hand, an annular groove 10 formed in rod 6 towards the lower end thereof and, on the other hand, an annular lipped seal 11 surrounding the rod and disposed between the outlet port 9 and the inlet port 8.
  • the respective shapes and dimensions of seal 11 and of groove 10 are such that, in the high position or injection or rest position shown in FIG. 1 (which will be explained subsequently), seal 11 does not bear against the sides of groove 10, the outlet port 9 being then in communication with housing 7.
  • seal 11 is in abut
  • the inlet port 8 emerges into a cavity 12 arranged to receive the head of the removable reservoir 13 (shown with a phantom line).
  • the reservoir may be secured to the carburetor in any known way.
  • Reservoir 13 contains an appropriate fuel in liquid form with a pressurized gas expellent chemically inert with respect to the liquid fuel.
  • a pressurized gas expellent chemically inert with respect to the liquid fuel.
  • it may be an aerosol mixture formed by a butane-propane (fuel) and nitrogen (propellent gas) compound.
  • Reservoir 13 comprises an orifice at its upper part, which is fitted with a back-pressure valve 14 (only the outer part of the actuating finger of which is visible in FIG. 1).
  • a spring 15, coaxial with rod 6, is placed between the lower end of the core 5 and the part of the casing defining housing 7.
  • rod 6 At its upper part, rod 6 is engaged in a bell-shaped part 16 projecting inside a sealed chamber 17 defined by the high parts of casing 2.
  • the bell-shaped part 16 has openings 18 communicating rod 6 with chamber 17. These openings 18 are situated at the base of the bell-shaped part 16 so that, with the apparatus installed in its vertical operating position, the auxiliary fuel may be expelled in front of the propellent gas.
  • chamber 17 there is disposed a piston 19 pushed back, under the action of a spring 20, to a position where the effective volume of chamber 17 is minimum.
  • Stop 22 which limits the movement of the piston to a predetermined value.
  • Stop 22 is made adjustable in any appropriate way: in the embodiment shown, the stop is adjustable by jumps.
  • the stop is constructed in the form of a pin having annular grooves 23 in one of which a locking part 24 is engaged.
  • Seals are provided at the ends of rod 6 and between the piston and the wall of the chamber: to reduce the friction and minimize the electric power to be drawn from the battery for operating the carburetor, the seals are lipped seals as shown.
  • such seals formed for example from "Rilson”, continue to fulfil their function at very low temperatures of the order of -30° C. to -35° C., which could not be the case with O-seals.
  • auxiliary carburetor of FIG. 1 The operation of the auxiliary carburetor of FIG. 1 is the following.
  • the time for filling chamber 17 is variable and depends, on the one hand, on the position of stop 22 and, on the other hand, on the pressure of the mixture; by way of example, this time is typically of the order of 2 to 5 seconds.
  • FIG. 2 shows an injector 25 arranged in any appropriate way for fixing on the wall 26 of a manifold.
  • injector 25 is provided, at its free end (lower end in FIG. 2), with a cut side 27 in which opens the injection port and which forms with the axis 28 of the injector an angle ⁇ such that, for a given diameter of the injection port and for a given injection pressure, the spraying cone 29 of the auxiliary fuel has a generatrix 30--the one closest to the wall of the manifold (upper generatrix in FIG. 2)--which is parallel to the manifold so as to avoid fuel being sprayed on to wall 26 and there condensing.
  • FIG. 3 shows another type of injector provided with two sloping sides 27a and 27b disposes symmetrically with respect to the axis of symmetry 28.
  • Generatrices 30a and 30b of the spraying cones 29a and 29b respectively are parallel to the manifold and so approximately aligned.
  • the projection of the injector into the manifold i.e. the distance d between the wall of the manifold and the injection port, becomes practically unimportant. It is then possible to use only one and the same type of injector for engines of different powers.
  • the above-mentioned distance d may be made relatively small so that this auxiliary injector projecting into the manifold, only causes a disturbance of minor importance of the flow of the mixture in normal operation.
  • the correct operation of the injector of the invention depends essentially on the reproducibility of the operating conditions, i.e. essentially on the injection pressure.
  • the result is that such an injector will prove particularly advantageous in combination with carburetors delivering fuel under an approximately constant pressure, as is the case for the auxiliary carburetor of the invention.
  • the injector of the invention may be provided with a deflector system formed, as shown in FIG. 4, by a disk 31, intended to be secured against the inner face of the cut side 27 of FIGS. 2 and 3, and carrying, on its face 32 turned outwardly of the injector, spirally wound walls 33 extending between a central orifice 34 and the peripheral edge 35 of the disk, walls 33 may either be projecting from the disk or, on the contrary, define a groove hollowed out in the disk.
  • deflector means create in the fuel injected into the manifold a swirling movement promoting mixing thereof with the air and with the main fuel.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
US06/276,460 1980-06-24 1981-06-23 Fuel, more especially auxiliary starting fuel, injectors for internal combustion engines and to auxiliary carburetors associable with such injectors Expired - Lifetime US4387677A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8014039 1980-06-24
FR8014039A FR2485636B1 (fr) 1980-06-24 1980-06-24 Perfectionnements apportes aux carburateurs auxiliaires de demarrage pour moteurs a combustion interne

Publications (1)

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US4387677A true US4387677A (en) 1983-06-14

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US06/276,460 Expired - Lifetime US4387677A (en) 1980-06-24 1981-06-23 Fuel, more especially auxiliary starting fuel, injectors for internal combustion engines and to auxiliary carburetors associable with such injectors

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Country Link
US (1) US4387677A (it)
JP (1) JPS5773860A (it)
AT (1) AT377061B (it)
BE (1) BE889365A (it)
CA (1) CA1162117A (it)
CH (1) CH646494A5 (it)
DE (1) DE3124835A1 (it)
ES (1) ES503823A0 (it)
FR (1) FR2485636B1 (it)
GB (1) GB2078308B (it)
IT (1) IT1137919B (it)
LU (1) LU83454A1 (it)
SE (1) SE450515B (it)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455982A (en) * 1982-03-05 1984-06-26 Robert Bosch Gmbh Electromagnetically actuatable valve
US4532906A (en) * 1982-08-10 1985-08-06 Robert Bosch Gmbh Fuel supply system
US4575008A (en) * 1983-07-26 1986-03-11 Robert Bosch Gmbh Fuel injection nozzle for internal combustion engines
US4945877A (en) * 1988-03-12 1990-08-07 Robert Bosch Gmbh Fuel injection valve
US5878962A (en) * 1997-09-24 1999-03-09 Siemens Automotive Corporation Pressure swirl injector with angled cone spray for fuel injection
US20090293978A1 (en) * 2008-05-30 2009-12-03 Rausch & Pausch Gmbh Spring-loaded piston accumulator with locking function
US20090293977A1 (en) * 2008-05-30 2009-12-03 Rausch & Pausch Gmbh Spring-tensioned Piston Accumulator With Detent Function
US20100051724A1 (en) * 2008-08-27 2010-03-04 Woodward Governor Company Dual Action Fuel Injection Nozzle
US7934696B1 (en) 2006-02-21 2011-05-03 John Gruben Ether injection control valve
US20120085450A1 (en) * 2010-10-08 2012-04-12 GM Global Technology Operations LLC Accumulator assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5839469A (en) * 1997-02-12 1998-11-24 Kold Ban International, Ltd. Solenoid valve for starting fluid injection system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418980A (en) * 1965-09-01 1968-12-31 Physics Internat Company Fuel injector-ignitor system for internal combustion engines
US3567135A (en) * 1968-01-30 1971-03-02 Bosch Gmbh Robert Electromagnetically operated fuel injection valve
US3858771A (en) * 1969-04-04 1975-01-07 Lablabo Soc Liquid delivery valve construction
US3966097A (en) * 1975-07-02 1976-06-29 Olin Corporation Fluid metering valve
US4292947A (en) * 1978-11-07 1981-10-06 Kabushiki Kaisha Toyota Chuo Kenkyusho Spill type swirl injector

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR630206A (fr) * 1926-05-15 1927-11-25 App J E Malivert Sa Des Perfectionnements aux injecteurs d'essence
US2943766A (en) * 1957-12-30 1960-07-05 Spray Products Corp Spray applicator system for injecting starting fluid into diesel and gasoline engines
US3198404A (en) * 1963-08-13 1965-08-03 James H Welches Pressurized dispenser having an electro-magnetic valve
US3416507A (en) * 1966-11-03 1968-12-17 Stewart Warner Corp Ether injection assembly for internal combustion engine
US3491920A (en) * 1968-04-05 1970-01-27 Westinghouse Electric Corp Measuring and dispensing valve with spring biased diaphragm
US3661133A (en) * 1971-01-13 1972-05-09 Stewart Warner Corp Engine starting aid
FR2155772B1 (it) * 1971-10-04 1975-07-18 Grigsby Gilbert
US4202309A (en) * 1978-07-20 1980-05-13 Burke James W Automatic starting fluid dispenser

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418980A (en) * 1965-09-01 1968-12-31 Physics Internat Company Fuel injector-ignitor system for internal combustion engines
US3567135A (en) * 1968-01-30 1971-03-02 Bosch Gmbh Robert Electromagnetically operated fuel injection valve
US3858771A (en) * 1969-04-04 1975-01-07 Lablabo Soc Liquid delivery valve construction
US3966097A (en) * 1975-07-02 1976-06-29 Olin Corporation Fluid metering valve
US4292947A (en) * 1978-11-07 1981-10-06 Kabushiki Kaisha Toyota Chuo Kenkyusho Spill type swirl injector

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455982A (en) * 1982-03-05 1984-06-26 Robert Bosch Gmbh Electromagnetically actuatable valve
US4532906A (en) * 1982-08-10 1985-08-06 Robert Bosch Gmbh Fuel supply system
US4575008A (en) * 1983-07-26 1986-03-11 Robert Bosch Gmbh Fuel injection nozzle for internal combustion engines
US4945877A (en) * 1988-03-12 1990-08-07 Robert Bosch Gmbh Fuel injection valve
US5878962A (en) * 1997-09-24 1999-03-09 Siemens Automotive Corporation Pressure swirl injector with angled cone spray for fuel injection
US7934696B1 (en) 2006-02-21 2011-05-03 John Gruben Ether injection control valve
US20090293977A1 (en) * 2008-05-30 2009-12-03 Rausch & Pausch Gmbh Spring-tensioned Piston Accumulator With Detent Function
US20090293978A1 (en) * 2008-05-30 2009-12-03 Rausch & Pausch Gmbh Spring-loaded piston accumulator with locking function
US7975725B2 (en) * 2008-05-30 2011-07-12 Rausch & Pausch Gmbh Spring-loaded piston accumulator with locking function
US7992592B2 (en) * 2008-05-30 2011-08-09 Rausch & Pausch Gmbh Spring-tensioned piston accumulator with detent function
US20100051724A1 (en) * 2008-08-27 2010-03-04 Woodward Governor Company Dual Action Fuel Injection Nozzle
US9291139B2 (en) 2008-08-27 2016-03-22 Woodward, Inc. Dual action fuel injection nozzle
US20120085450A1 (en) * 2010-10-08 2012-04-12 GM Global Technology Operations LLC Accumulator assembly
US8567444B2 (en) * 2010-10-08 2013-10-29 GM Global Technology Operations LLC Accumulator assembly

Also Published As

Publication number Publication date
GB2078308A (en) 1982-01-06
AT377061B (de) 1985-02-11
ES8204799A1 (es) 1982-06-01
CH646494A5 (fr) 1984-11-30
DE3124835C2 (it) 1990-01-18
CA1162117A (en) 1984-02-14
FR2485636A1 (fr) 1981-12-31
FR2485636B1 (fr) 1985-11-29
SE450515B (sv) 1987-06-29
LU83454A1 (fr) 1983-04-06
SE8103927L (sv) 1981-12-25
BE889365A (fr) 1981-12-28
ATA279881A (de) 1984-06-15
GB2078308B (en) 1984-12-12
IT1137919B (it) 1986-09-10
IT8122541A0 (it) 1981-06-24
JPS5773860A (en) 1982-05-08
ES503823A0 (es) 1982-06-01
DE3124835A1 (de) 1982-02-25

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